Bob Salvo wrote:
It seems to me that having the sensor hanging freely like a pendulum
(pointing down) would make it measure the vertical component.

"Eric Greenwell" wrote in message
...

OK, I'm persuaded! It now appears the sensor would need to be aimed up
or down rather accurately, or the at least the angle off vertical
measured accurately. Dang - that's harder. Perhaps the inertial system
would be a reasonable way to achieve this, or maybe differential GPS
system with antennas on the nose and tail.

Maybe that would be good enough - especially for flying in smooth air,
like wave flying or early morning test flights. Or, maybe these units
would measure quickly enough, all you'd need would be occasional 5-10
seconds of smooth air.


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Eric Greenwell
Washington State
USA